US4503921A - Weighing system - Google Patents
Weighing system Download PDFInfo
- Publication number
- US4503921A US4503921A US06/529,556 US52955683A US4503921A US 4503921 A US4503921 A US 4503921A US 52955683 A US52955683 A US 52955683A US 4503921 A US4503921 A US 4503921A
- Authority
- US
- United States
- Prior art keywords
- sheave
- load
- fixed
- support frame
- pin
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G19/00—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups
- G01G19/02—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for weighing wheeled or rolling bodies, e.g. vehicles
- G01G19/025—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for weighing wheeled or rolling bodies, e.g. vehicles wheel-load scales
- G01G19/027—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for weighing wheeled or rolling bodies, e.g. vehicles wheel-load scales using electrical weight-sensitive devices
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G19/00—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups
- G01G19/14—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for weighing suspended loads
- G01G19/18—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for weighing suspended loads having electrical weight-sensitive devices
Definitions
- This invention relates to a weighing system which utilizes shear type load cells in a load handling system.
- the invention is an improvement over that disclosed in our U.S. Pat. No. 3,899,034 issued Aug. 12, 1975.
- the weighing system of the present invention eliminates inaccurate readings of the weight caused by misalignment of the load cells.
- a weighing system in conjunction with a loadhandling crane hanger permits the operating personnel to know how large the load being handled is at any particular time. This information enables the operators to determine a variety of things.
- a ladle crane it permits the operator to determine when there is not enough molten steel remaining for another ingot and thereby prevents the waste of an ingot due to an insufficient amount of metal. It permits the operator to know if he has overloaded the crane.
- U.S. Pat. No. 3,899,034 there was disclosed a weighing system which generally overcame many of the problems faced by the art in connection with ladle crane hanger weighing systems.
- the inventors provided load cells between the sheave basket and ladle hanger.
- the inventors In order to stablilize the sheave basket in the load hanger the inventors used truss rods and bolted flexure plates designed to allow the basket to move within the limits of deflection of the load cells.
- This system in general worked satisfactorily. Unfortunately, however, despite all the obvious advantages of using a weighing system such as that of U.S. Pat. No. 3,899,034, it was discovered that any misadjustment or a destructive impact can change these truss rods and flexure plates and cause misalignment of the load cells leading to inaccurate impulses from the load cells to the electronic counters, thus producing a false readout.
- the ladle hanger in the present invention is provided with accurately machined pads and threaded holes with adjustment bolts which engage accurately machined guides and pads on the sheave basket so that the sheave basket can be accurately set in the ladle hanger and held against such transverse movement as will affect the accuracy of the load cells.
- the present invention completely eliminates the need for check rods or deflection plates or the like devices required to keep the parts in vertical alignment so that accurate readings can be made.
- the present invention provides a system based upon the use of shear beam load cells in a three point suspension as distinguished from compression type load cells.
- the accuracy of the system is greater because of the fact that none of the vertical load which is to be recorded is lost in deflecting the check rods and deflection plates.
- the three point suspension compensates for misalignment and deflection permitting the loading on the cells to remain constant which is necessary to obtain accurate weight reading.
- a weighing system in combination with the upper sheave assembly of a crane.
- a support frame an upper sheave assembly for a crane having a sheave on said support frame, a sheave pin on which the sheave rotates, a fixed load block supporting one end of said pin, a pivot load block supporting the other end of said pin, a first pair of shear beam load cells fixed at one end on the support frame and connected at the other end to the fixed load block, a second pair of shear beam load cells fixed at one end on the support frame and a pivotable connection between the other end of said second pair of shear beams and the pivot load blocks whereby the said one end of the sheave pin is fixedly supported and the other end is pivotally supported.
- the said other end of the second pair of shear beam load cells is connected to the pivot load block by a ball and socket mounting.
- the load blocks may be attached to a sheave basket or they may simply support the sheave pin ends without a
- FIG. 1 is a top plan view of a crane with the upper sheaves employing the weighing system of this invention
- FIG. 2 is a section through a sheave assembly and weighing device according to this invention.
- FIG. 3 is an end elevation of the sheave assembly of FIG. 2;
- FIG. 4 is an enlarged fragmentary section of a ball and socket mounting between each load block and a shear beam load cell according to this invention
- FIG. 5 is a section on the line V--V of FIG. 4;
- FIG. 6 is an elevational view of a sheave assembly of a second embodiment of upper sheave assembly employing a sheave basket and the invention
- FIG. 7 is an end elevational view of the fixed end of the assembly of FIG. 6.
- FIG. 8 is an end elevational view of the pivot end of the assembly of FIG. 6.
- the sheave assemblies are made up of one or more sheaves 17 rotatable on a sheave pin 18 supported on load blocks 19 and 20, one fixed at one end of the sheave pin and the other pivoted on the other end of the sheave pin as hereafter described.
- Each load block is supported on opposite sides by shear beam type load cells 21.
- the fixed load block 20 supports one end of sheave pin 18 which is keyed in load block 20 to prevent rotation.
- Load block 20 is provided with arms 22 extending from opposite sides over the free cantilevered ends 23 of shear beam load cells 21 which are fixed at the opposite ends to a support frame 24.
- Load block 19 pivotally supports the other end of sheave pin 18 and is likewise provided with arms 22 extending from opposite sides.
- Each of these arms 22 carries half of a ball and socket connection 25, the other half of which is carried by the cantilevered ends 23 of the shear beam load cells, as shown more fully at FIGS. 4 and 5.
- An overload stop 26 is provided on the support frame.
- This fixed load block 20 thus forms two points of a three point suspension, one point at each ball and socket con- nection. The third point is the pivot load block 19.
- the foregoing mounting prevents erratic load conditions caused by misalignment and deflections.
- the load cells are thus subjected to the load which is to be recorded thus making the system capable of the desired accuracy.
- FIGS. 6, 7 and 8 we have illustrated a second embodiment in which like parts carry like numbers with a prime sign.
- the primary difference is the inclusion of a sheave basket 40 on which the load blocks 19' and 20' are fastened.
- the sheave pin 18' is journalled in the sheave basket ends at the load blocks.
- the load blocks are in turn supported at the fixed load block 20' by arms 22' extending from opposite sides over the free cantilevered ends 23' of shear beam load cells 21'.
- Pivot load block 19' pivotally supports the basket 40 and the other end of sheave pin 18' and is likewise provided with arms 22' extending from opposite sides.
- Each arm as in the first embodiment, carries half of a ball and socket connection 25; the other half of which is carried by the cantilever arm 23 of a shear beam load cell as shown in detail in FIGS. 4 and 5. Again, an overload stop 26 is provided on the support frame.
Abstract
Description
Claims (5)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US06/529,556 US4503921A (en) | 1983-09-06 | 1983-09-06 | Weighing system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US06/529,556 US4503921A (en) | 1983-09-06 | 1983-09-06 | Weighing system |
Publications (1)
Publication Number | Publication Date |
---|---|
US4503921A true US4503921A (en) | 1985-03-12 |
Family
ID=24110395
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US06/529,556 Expired - Fee Related US4503921A (en) | 1983-09-06 | 1983-09-06 | Weighing system |
Country Status (1)
Country | Link |
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US (1) | US4503921A (en) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4638876A (en) * | 1984-10-05 | 1987-01-27 | Franz Balduin | Weighing apparatus |
USRE35301E (en) * | 1985-09-17 | 1996-07-23 | Stress-Tek, Inc. | On-board load cell |
WO1996030729A1 (en) * | 1995-03-27 | 1996-10-03 | Ohkura Electric Co., Ltd. | Apparatus for weighing a grown crystal |
US5831222A (en) * | 1996-03-08 | 1998-11-03 | Mannesmann Aktiengesellschaft | Measuring device having a load measuring element |
US5905211A (en) * | 1997-12-15 | 1999-05-18 | The United States Of America As Represented By The Secretary Of The Navy | Load monitor sheave |
WO2017075667A1 (en) * | 2015-11-06 | 2017-05-11 | Conweigh Innovation Pty Ltd | Apparatus for determining the weight of an object |
US10358322B2 (en) * | 2016-06-23 | 2019-07-23 | Liebherr-Werk Ehingen Gmbh | Load weighing at the lifting hook |
CN110817682A (en) * | 2019-11-14 | 2020-02-21 | 淮阴工学院 | Pulley equipment for oil tanker |
US11473989B2 (en) * | 2018-07-31 | 2022-10-18 | Illinois Tool Works Inc. | Multi-dimensional sheave for use in tension measurement systems |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3565196A (en) * | 1969-06-06 | 1971-02-23 | B L H Electronics Inc | Mobile electrical weighing platform |
US3899034A (en) * | 1973-12-06 | 1975-08-12 | Alliance Machine Co | Weighing system |
US4237727A (en) * | 1979-04-30 | 1980-12-09 | Hottinger Baldwin Measurements, Inc. | Mechanical moment sensitivity compensation in shear beam transducers |
US4368792A (en) * | 1981-07-10 | 1983-01-18 | The Alliance Machine Company | Weighing system |
US4413691A (en) * | 1981-10-23 | 1983-11-08 | Quest Corporation | Sheave block weighing assembly |
-
1983
- 1983-09-06 US US06/529,556 patent/US4503921A/en not_active Expired - Fee Related
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3565196A (en) * | 1969-06-06 | 1971-02-23 | B L H Electronics Inc | Mobile electrical weighing platform |
US3899034A (en) * | 1973-12-06 | 1975-08-12 | Alliance Machine Co | Weighing system |
US4237727A (en) * | 1979-04-30 | 1980-12-09 | Hottinger Baldwin Measurements, Inc. | Mechanical moment sensitivity compensation in shear beam transducers |
US4368792A (en) * | 1981-07-10 | 1983-01-18 | The Alliance Machine Company | Weighing system |
US4413691A (en) * | 1981-10-23 | 1983-11-08 | Quest Corporation | Sheave block weighing assembly |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4638876A (en) * | 1984-10-05 | 1987-01-27 | Franz Balduin | Weighing apparatus |
USRE35301E (en) * | 1985-09-17 | 1996-07-23 | Stress-Tek, Inc. | On-board load cell |
WO1996030729A1 (en) * | 1995-03-27 | 1996-10-03 | Ohkura Electric Co., Ltd. | Apparatus for weighing a grown crystal |
US5763838A (en) * | 1995-03-27 | 1998-06-09 | Ohkura Electric Co., Ltd. | Apparatus for weighing a grown crystal |
US5831222A (en) * | 1996-03-08 | 1998-11-03 | Mannesmann Aktiengesellschaft | Measuring device having a load measuring element |
US5905211A (en) * | 1997-12-15 | 1999-05-18 | The United States Of America As Represented By The Secretary Of The Navy | Load monitor sheave |
WO2017075667A1 (en) * | 2015-11-06 | 2017-05-11 | Conweigh Innovation Pty Ltd | Apparatus for determining the weight of an object |
US11073419B2 (en) | 2015-11-06 | 2021-07-27 | Conweigh Innovation Pty Ltd | Apparatus including a bracket connector for determining the weight of an object such as a shipping container |
US10358322B2 (en) * | 2016-06-23 | 2019-07-23 | Liebherr-Werk Ehingen Gmbh | Load weighing at the lifting hook |
US11473989B2 (en) * | 2018-07-31 | 2022-10-18 | Illinois Tool Works Inc. | Multi-dimensional sheave for use in tension measurement systems |
CN110817682A (en) * | 2019-11-14 | 2020-02-21 | 淮阴工学院 | Pulley equipment for oil tanker |
CN110817682B (en) * | 2019-11-14 | 2020-12-22 | 淮阴工学院 | Pulley equipment for oil tanker |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: ALLIANCE MACHINE COMPANY, THE ALLIANCE, OH. 44601 Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNORS:POLEN, KARL L.;SCOTT, EDWARD S.;REEL/FRAME:004172/0987 Effective date: 19830822 |
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REMI | Maintenance fee reminder mailed | ||
LAPS | Lapse for failure to pay maintenance fees | ||
STCH | Information on status: patent discontinuation |
Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362 |
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FP | Lapsed due to failure to pay maintenance fee |
Effective date: 19890312 |
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AS | Assignment |
Owner name: ALLI ACQUISITION CORP., A CORP. OF DE Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:ALLIANCE MACHINE COMPANY, THE, ("ALLIANCE");REEL/FRAME:005311/0544 Effective date: 19890630 |
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AS | Assignment |
Owner name: HELLER FINANCIAL, INC., AS AGENT Free format text: SECURITY INTEREST;ASSIGNOR:CHATWINS GROUP, INC. A CORP. OF DE;REEL/FRAME:005691/0010 Effective date: 19901212 Owner name: HELLER FINANCIAL, INC. Free format text: SECURITY INTEREST;ASSIGNOR:CHATWINS GROUP, INC., A CORP. OF DELAWARE;REEL/FRAME:005659/0089 Effective date: 19901212 |
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AS | Assignment |
Owner name: CHATWINS GROUP, INC., PENNSYLVANIA Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:HELLER FINANCIAL, INC.;REEL/FRAME:006578/0326 Effective date: 19930503 Owner name: HELLER FINANCIAL, INC., ILLINOIS Free format text: SECURITY INTEREST;ASSIGNOR:CHATWINS GROUP, INC.;REEL/FRAME:006578/0331 Effective date: 19930503 |
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AS | Assignment |
Owner name: HELLER FINANCIAL, INC., ILLINOIS Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:CHATWINS GROUP, INC.;REEL/FRAME:006578/0333 Effective date: 19930503 |
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AS | Assignment |
Owner name: HELLER FINANCIAL, INC., ILLINOIS Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:CHATWINS GROUP, INC.;REEL/FRAME:006898/0529 Effective date: 19940304 |
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AS | Assignment |
Owner name: REUNION INDUSTRIES, INC., PENNSYLVANIA Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:CHATWINS GROUP, INC.;REEL/FRAME:011103/0669 Effective date: 20000808 |